Can let emit return a Promise array?please

[LastHeaven]

What problem does this feature solve?

That can do something after emit event。

What does the proposed API look like?

const loading = ref(false)
const onClick = async () =>  {
 // doSomething
  loading.value = false
  // emit event
  await Promise.all(emit('click'))
  // doSomething
  loading.value = false
}

[sqal]

A similar issue was reported in 2.x long time ago vuejs/vue#5443

however, emit in vue 3 works differently than $emit in 2.x. In vue 3, emit basically calls a prop which name starts with onXXX so emit('click') is equivalent to calling props.onClick(). As we can see in the source code emit currently doesn't return anything so you should probably try with calling the onClick prop directly:

await props.onClick()
// or
// Promise.all expects an array
await Promise.all([
  props.onClick()
])

[yyx990803]

Now that I think about it, simply returning an array containing the values of all triggered handlers would make sense. It'd be best to submit an RFC for this though: https://github.com/vuejs/rfcs

[yyx990803]

FYI this has been removed in 55566e8 (see commit message for details)